389142550 has 12 divisors (see below), whose sum is σ = 723805236. Its totient is φ = 155657000.

The previous prime is 389142539. The next prime is 389142557. The reversal of 389142550 is 55241983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389142557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3891376 + ... + 3891475.

It is an arithmetic number, because the mean of its divisors is an integer number (60317103).

Almost surely, 2^389142550 is an apocalyptic number.

389142550 is a deficient number, since it is larger than the sum of its proper divisors (334662686).

389142550 is a wasteful number, since it uses less digits than its factorization.

389142550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782863 (or 7782858 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 389142550 is about 19726.6963782586. The cubic root of 389142550 is about 730.0785241108.

The spelling of 389142550 in words is "three hundred eighty-nine million, one hundred forty-two thousand, five hundred fifty".